Display device

ABSTRACT

The disclosure provides a display device, including a first thin film transistor, an insulating layer disposed on the first thin film transistor, a conductive line, and a pixel define layer. The conductive line is electrically coupled to the first thin film transistor via a first contact hole of the insulating layer. The pixel define layer is disposed on the insulating layer. The pixel define layer has a first opening region, a second opening region, and a third opening region. The first opening region and the second opening region are arranged along the first direction. A distance is the shortest distance between the first contact hole and the first opening region. A second distance is the shortest distance between the first contact hole and the second opening region. The first distance is different from the second distance.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of China application serialno. 201710081372.5, filed on Feb. 15, 2017. The entirety of theabove-mentioned patent application is hereby incorporated by referenceherein and made a part of this specification.

BACKGROUND OF THE INVENTION Field of the Disclosure

The disclosure relates to a display device.

Description of Related Art

The display panel in display device has been widely used in a variety ofelectronic products because of its advantages such as small size and lowradiation. As the display technology advances, consumers hold a higherstandard for the specification of display panel. Besides wide viewingangle, high contrast, and high color saturation, the consumers alsoexpect to see better resolution. However, there are many types ofcomponents disposed in the display panel, which makes it difficult toimprove the resolution of the display panel.

SUMMARY OF THE INVENTION

The disclosure is directed to a display device that achieves highresolution.

According to an embodiment of the disclosure, the display deviceincludes a substrate, a first thin film transistor disposed on thesubstrate, an insulating layer disposed on the first thin filmtransistor, a conductive line, and a pixel define layer. The conductiveline is disposed on the insulating layer and is electrically coupled tothe first thin film transistor via a first contact hole of theinsulating layer. The conductive line extends along a first direction.The pixel define layer is disposed on the insulating layer. The pixeldefine layer has a first opening region, a second opening region, and athird opening region. The first opening region and the second openingregion are arranged along the first direction. The third opening regionis adjacent to the first opening region and the second opening region.The conductive line is located between the first opening region and thethird opening region, and the first contact hole is located between thefirst opening region and the second opening region. The area of thefirst opening region is less than the area of the third opening region.The area of the second opening region is less than the area of the thirdopening region. The first contact hole and the first opening region areseparated by a first distance. The first contact hole and the secondopening region are separated by a second distance. The first distance isdifferent from the second distance.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the disclosure, and are incorporated in and constitutea part of this specification. The drawings illustrate exemplaryembodiments of the disclosure and, together with the description, serveto explain the principles of the disclosure.

FIG. 1 is a schematic top view of the display device according to anembodiment of the disclosure.

FIG. 2 is a schematic cross-sectional view of the display deviceaccording to an embodiment of the disclosure.

FIG. 3 is a schematic enlarged view of a part of the display device ofFIG. 1.

FIG. 4 is a schematic enlarged view of a part of the display deviceaccording to another embodiment of the disclosure.

FIG. 5 is a schematic enlarged view of a part of the display deviceaccording to yet another embodiment of the disclosure.

FIG. 6 is a schematic top view of the display device according to yetanother embodiment of the disclosure.

FIG. 7 is a schematic top view of the display device according to anembodiment of the disclosure.

FIG. 8 illustrates the first side and the second side of the conductiveline of FIG. 1.

DESCRIPTION OF THE EMBODIMENTS

Descriptions of the disclosure are given with reference to the exemplaryembodiments illustrated by the figures. Wherever possible, the samereference numerals are used in the figures and the descriptions to referto the same or similar parts.

A being perpendicular to B indicates that an included angle between Aand B ranges from 85°˜95°. A being parallel to B indicates that anincluded angle between A and B ranges from −5°˜5°.

FIG. 1 is a schematic top view of a display device according to anembodiment of the disclosure. FIG. 2 is a schematic cross-sectional viewof the display device according to an embodiment of the disclosure. Inparticular, FIG. 2 corresponds to the lines A-A′, B-B′, C-C′, D-D′,E-E′, and F-F′ of FIG. 1. Referring to FIG. 1 and FIG. 2, a displaydevice 100 includes a substrate 110, a first thin film transistor T_(r),an insulating layer 140, a conductive line 152, and a pixel define layer170. In this embodiment, the material of the substrate 110 may be glass,quartz, an organic polymer, an opaque/reflective material (e.g., aconductive material, a wafer, ceramics, or other suitable materials), orother suitable materials. The substrate 110 may be a hard substrate, asoft substrate, or a soft and hard composite, but not limited thereto.The display device 100 of the disclosure may also be a flexible displaydevice, a touch display device, or a curved display device, but notlimited thereto.

The first thin film transistor T_(r) is disposed on the substrate 110.In this embodiment, the display device 100 further includes a secondthin film transistor T_(d1), a second thin film transistor T_(d2), asecond thin film transistor T_(d3), and a second thin film transistorT_(d4) disposed on the substrate 110. The processes for the first thinfilm transistor T_(r), the second thin film transistor T_(d1), thesecond thin film transistor T_(d2), the second thin film transistorT_(d3), and the second thin film transistor T_(d4) are described indetail hereinafter, for example. In this embodiment, a semiconductorpattern (not shown) may be formed on the substrate 110 first; then aportion of the semiconductor pattern is modified (doped, for example),wherein the modified portion of the semiconductor pattern forms aconductive pattern 112, wherein the conductive pattern 112 may include afirst end S and a second end D of the first thin film transistor T_(r),a first end S and a second end D of the second thin film transistorT_(d1), a first end S and a second end D of the second thin filmtransistor T_(d2), a first end S and a second end D of the second thinfilm transistor T_(d3), and a first end S and a second end D of thesecond thin film transistor T_(d4), and another unmodified portion ofthe semiconductor pattern forms a channel CH of the first thin filmtransistor T_(r) and channels CH of the second thin film transistorT_(d1), the second thin film transistor T_(d2), the second thin filmtransistor T_(d3), and the second thin film transistor T_(d4), whereinthe first end S and the second end D of the first thin film transistorT_(r) are respectively electrically coupled to two sides of the channelCH of the first thin film transistor T_(r), the first end S and thesecond end D of the second thin film transistor T_(d1) are respectivelyelectrically coupled to two sides of the channel CH of the second thinfilm transistor T_(d1), the first end S and the second end D of thesecond thin film transistor T_(d2) are respectively electrically coupledto two sides of the channel CH of the second thin film transistorT_(d2), the first end S and the second end D of the second thin filmtransistor T_(d3) are respectively electrically coupled to two sides ofthe channel CH of the second thin film transistor T_(d3), and the firstend S and the second end D of the second thin film transistor T_(d4) arerespectively electrically coupled to two sides of the channel CH of thesecond thin film transistor T_(d4); next, an insulating layer 120 isformed to cover the conductive pattern 112, the channel CH of the firstthin film transistor T_(r), and the channels CH of the second thin filmtransistor T_(d1), the second thin film transistor T_(d2), the secondthin film transistor T_(d3), and the second thin film transistor T_(d4);thereafter, a gate G of the first thin film transistor T_(r) and gates Gof the second thin film transistor T_(d1), the second thin filmtransistor T_(d2), the second thin film transistor T_(d3), and thesecond thin film transistor T_(d4) are formed on the insulating layer120; and then, an insulating layer 130 is formed to cover the gate G ofthe first thin film transistor T_(r), the gates G of the second thinfilm transistor T_(d1), the second thin film transistor T_(d2), thesecond thin film transistor T_(d3), and the second thin film transistorT_(d4), and a portion of the insulating layer 120. In this embodiment,the first end S may be a source and the second end D may be a drain.Nevertheless, the disclosure is not limited thereto. In otherembodiments, the first end S may be a drain and the second end D may bea source. The layer structure described in this embodiment is merely anexample. In other embodiments, other layer structures may be disposedtherein and are not particularly limited to the above. In thisembodiment, the electrical coupling may include cases where twocomponents are electrically connected directly, electrically connecteddirectly via a conductive layer or a semiconductor layer, or connectedvia other components (e.g., a thin film transistor or a capacitor)therebetween.

In this embodiment, considering conductivity, the gate G, the first endS, and/or the second end D may be formed of a metal material, but thedisclosure is not limited thereto. In other embodiments, the gate G, thefirst end S, and/or the second end D may be formed of other conductivematerials, such as an alloy, a nitride of a metal material, an oxide ofa metal material, a nitrogen oxide of a metal material, or a stack layerof a metal material and other conductive materials. The material of theinsulating layer 120 and/or the insulating layer 130 may be an inorganicmaterial (e.g., silicon oxide, silicon nitride, silicon oxynitride,alumina, or a stack layer of at least two of the foregoing materials),an organic material, or a combination of the foregoing. The material ofthe channel CH of the first thin film transistor T_(r) and the channelsCH of the second thin film transistor T_(d1), the second thin filmtransistor T_(d2), the second thin film transistor T_(d3), and thesecond thin film transistor T_(d4) may be amorphous silicon,polycrystalline silicon, microcrystalline silicon, monocrystallinesilicon, an organic semiconductor material, an oxide semiconductormaterial (e.g., indium zinc oxide, indium germanium zinc oxide, indiumtin zinc oxide, other suitable materials, or a combination of theforegoing), other suitable materials, or a combination of the foregoing,but the disclosure is not limited thereto.

It should be noted that the aforementioned processes for the first thinfilm transistor T_(r), the second thin film transistor T_(d1), thesecond thin film transistor T_(d2), the second thin film transistorT_(d3), and the second thin film transistor T_(d4) are examples forexplaining the disclosure and should not be construed as a limitation tothe disclosure. In other embodiments, the first thin film transistorT_(r), the second thin film transistor T_(d1), the second thin filmtransistor T_(d2), the second thin film transistor T_(d3), and thesecond thin film transistor T_(d4) may be formed by other suitablemethods. Moreover, the forms of the first thin film transistor T_(r),the second thin film transistor T_(d1), the second thin film transistorT_(d2), the second thin film transistor T_(d3), and the second thin filmtransistor T_(d4) are not limited to the top-gate TFT as shown in FIG.2. In other embodiments, the first thin film transistor T_(r), thesecond thin film transistor T_(d1), the second thin film transistorT_(d2), the second thin film transistor T_(d3), and the second thin filmtransistor T_(d4) may also be bottom-gate TFT, dual-gate TFT, or othersuitable TFTs.

A connection portion 132 is disposed on the insulating layer 130 and iselectrically coupled to one of the first end S and the second end D ofthe first thin film transistor T_(r), one of the first end S and thesecond end D of the second thin film transistor T_(d1), one of the firstend S and the second end D of the second thin film transistor T_(d2),one of the first end S and the second end D of the second thin filmtransistor T_(d3), or one of the first end S and the second end D of thesecond thin film transistor T_(d4) via a through hole of the insulatinglayer 130. The insulating layer 140 is disposed on the first thin filmtransistor T_(r) and has a first contact hole 142. In other words, theinsulating layer 140 covers the first thin film transistor T_(r) and thefirst contact hole 142 of the insulating layer 140 exposes a portion ofthe connection portion 132. In this embodiment, the insulating layer 140is further disposed on the second thin film transistor T_(d1), thesecond thin film transistor T_(d2), the second thin film transistorT_(d3), and the second thin film transistor T_(d4), and has a pluralityof second contact holes 144. The second contact holes 144 respectivelyexpose a portion of a plurality of connection portions 132. In thisembodiment, the material of the insulating layer 140 may be an inorganicmaterial (e.g., silicon oxide, silicon nitride, silicon oxynitride, or astack layer of at least two of the foregoing materials), an organicmaterial, or a combination of the foregoing.

The conductive line 152 is disposed on the insulating layer 140 and iselectrically coupled to the first thin film transistor T_(r) via thefirst contact hole 142 and the connection portion 132. In thisembodiment, a reset voltage (V_(ref)) may be inputted to one of thefirst end S and the second end D of the first thin film transistor T_(r)via the conductive line 152 (e.g., the second end D of the first thinfilm transistor T_(r)). In other words, the first thin film transistorT_(r) may be a reset thin film transistor, but the disclosure is notlimited thereto. In this embodiment, considering conductivity, theconductive line 152 may be formed of a metal material, but thedisclosure is not limited thereto. In other embodiments, the conductiveline 152 may be formed of other conductive materials, such as an alloy,a nitride of a metal material, an oxide of a metal material, a nitrogenoxide of a metal material, or a stack layer of a metal material andother conductive materials.

In this embodiment, the display device 100 further includes a pluralityof electrodes 154 disposed on the insulating layer 140. The electrodes154 are respectively electrically coupled to the second thin filmtransistor T_(d1), the second thin film transistor T_(d2), the secondthin film transistor T_(d3), and the second thin film transistor T_(d4)via the second contact holes 144. That is, the electrodes 154 arerespectively electrically coupled to the second thin film transistorT_(d1), the second thin film transistor T_(d2), the second thin filmtransistor T_(d3), and the second thin film transistor T_(d4) via thesecond contact holes 144 and the connection portions 132. In thisembodiment, the electrodes 154 and the conductive line 152 may beselectively formed in the same layer, but the disclosure is not limitedthereto. In other embodiments, the electrodes 154 and the conductiveline 152 may be respectively formed in different layers. In thisembodiment, the material of the electrode 154 is a reflective conductivematerial, such as a metal, an alloy, and so on, but the disclosure isnot limited thereto. In other embodiments, the material of the electrode154 may be a translucent conductive material, such as indium tin oxide,indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indiumgermanium zinc oxide, other suitable oxides, or a stack layer of atleast two of the foregoing. The display device 100 further includes adisplay medium disposed corresponding to the electrode 154. In thisembodiment, the display medium includes an organic electroluminescentpattern 161, an organic electroluminescent pattern 162, an organicelectroluminescent pattern 163, and an organic electroluminescentpattern 164, for example, but the disclosure is not limited thereto. Inother embodiments, the display medium may be other suitable materials.The organic electroluminescent pattern 161, the organicelectroluminescent pattern 162, the organic electroluminescent pattern163, and the organic electroluminescent pattern 164 are respectivelydisposed on the electrodes 154 corresponding to the second thin filmtransistor T_(d1), the second thin film transistor T_(d2), the secondthin film transistor T_(d3), and the second thin film transistor T_(d4),and the electrodes 154 may be anodes.

In this embodiment, the display device 100 further includes a power linePL (as shown in FIG. 1) disposed on the substrate 110. The power line PLhas a power voltage (V_(DD)) and is electrically coupled to one of thefirst ends S and the second ends D of the second thin film transistorT_(d1), the second thin film transistor T_(d2), the second thin filmtransistor T_(d3), and the second thin film transistor T_(d4). Theelectrodes 154 of the organic electroluminescent pattern 161, theorganic electroluminescent pattern 162, the organic electroluminescentpattern 163, and the organic electroluminescent pattern 164 may beelectrically coupled to the second ends D of the second thin filmtransistor T_(d1), the second thin film transistor T_(d2), the secondthin film transistor T_(d3), and the second thin film transistor T_(d4).In other words, in this embodiment, the second thin film transistorT_(d1), the second thin film transistor T_(d2), the second thin filmtransistor T_(d3), and the second thin film transistor T_(d4) may belight emitting thin film transistors, but the disclosure is not limitedthereto.

The pixel define layer 170 is disposed on the insulating layer 140. Thepixel define layer 170 includes a first opening region 170 a, a secondopening region 170 b, and a third opening region 170 c. In thisembodiment, the pixel define layer 170 further includes a fourth openingregion 170 d. The first opening region 170 a, the second opening region170 b, the third opening region 170 c, and the fourth opening region 170d respectively partially expose the electrodes 154 that are electricallycoupled to the second thin film transistor T_(d1), the second thin filmtransistor T_(r), the second thin film transistor T_(d3), and the secondthin film transistor T_(d4). In other words, the electrodes 154partially overlap the first opening region 170 a, the second openingregion 170 b, the third opening region 170 c, and the fourth openingregion 170 d respectively. The “overlap” described in the disclosurerefers to overlap in a direction perpendicular to the substrate 110 (inthe top view). The organic electroluminescent pattern 161, the organicelectroluminescent pattern 162, the organic electroluminescent pattern163, and the organic electroluminescent pattern 164 are respectivelydisposed in the first opening region 170 a, the second opening region170 b, the third opening region 170 c, and the fourth opening region 170d of the insulating layer 140. The display device 100 further includes acommon electrode 180. A potential difference between the commonelectrode 180 and the electrodes 154 drives the display medium (e.g.,the organic electroluminescent pattern 161, the organicelectroluminescent pattern 162, the organic electroluminescent pattern163, and the organic electroluminescent pattern 164) to emit light. Thecommon electrode 180 may have a ground potential, but the disclosure isnot limited thereto. In this embodiment, the common electrode 180 may bedisposed on the pixel define layer 170, and be disposed in the firstopening region 170 a, the second opening region 170 b, the third openingregion 170 c, and the fourth opening region 170 d to be electricallycoupled to the organic electroluminescent pattern 161, the organicelectroluminescent pattern 162, the organic electroluminescent pattern163, and the organic electroluminescent pattern 164, but the disclosureis not limited thereto. In this embodiment, the common electrode 180 maybe a translucent conductive material, such as indium tin oxide, indiumzinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germaniumzinc oxide, other suitable oxides, or a stack layer of at least two ofthe foregoing. However, the disclosure is not limited thereto. In otherembodiments, the common electrode 180 may also be a reflectiveconductive layer and use other suitable materials.

In this embodiment, the display device 100 further includes a data lineDL (as shown in FIG. 1) and a scan line (not shown). The display device100 may further include a switching thin film transistor (not shown). Agate of the switching thin film transistor is electrically coupled tothe scan line. One of a first end and a second end of the switching thinfilm transistor is electrically coupled to the data line DL. The resetvoltage (V_(ref)) is inputted to one of the first end S and the secondend D of the first thin film transistor T_(r) (e.g., the second end D ofthe first thin film transistor T_(r)). A reset signal is inputted to thegate G of the first thin film transistor T_(r). One of the first end Sand the second end D of the first thin film transistor T_(r) (e.g., thefirst end S of the first thin film transistor T_(r)) and one of thefirst end S and the second end D of the second thin film transistorT_(d1), the second thin film transistor T_(d2), the second thin filmtransistor T_(d3), or the second thin film transistor T_(d4) areelectrically coupled to a node (not shown). The first thin filmtransistor T_(r) may reset the voltage of the node according to thereset signal, so as to reset a light emitting status of the firstopening region 170 a, the second opening region 170 b, the third openingregion 170 c, or the fourth opening region 170 d.

Referring to FIG. 1, the conductive line 152 extends along a firstdirection x. The first opening region 170 a and the second openingregion 170 b are arranged along the first direction x. The third openingregion 170 c and the first opening region 170 a are adjacent to eachother (“adjacent” is defined as that no other opening region exists onthe shortest connection line between two opening regions), and the thirdopening region 170 c and the second opening region 170 b are adjacent toeach other. The area of the first opening region 170 a is less than thearea of the third opening region 170 c. The area of the second openingregion 170 b is less than the area of the third opening region 170 c. Asshown in FIG. 2, the area of the first opening region 170 a, the area ofthe second opening region 170 b, and the area of the third openingregion 170 c respectively refer to the area of a bottom portion 173 ofthe first opening region 170 a, the area of a bottom portion 173 of thesecond opening region 170 b, and the area of a bottom portion 173 of thethird opening region 170 c. The conductive line 152 is located betweenthe first opening region 170 a and the third opening region 170 c. Theconductive line 152 is electrically coupled to the first thin filmtransistor T_(r) via the first contact hole 142, and the first contacthole 142 is located between the first opening region 170 a and thesecond opening region 170 b. In this embodiment, the first openingregion 170 a and the second opening region 170 b are arranged along thefirst direction x to form a first row, and the fourth opening region 170d and the third opening region 170 c are arranged along the firstdirection x to form a second row. The first row may be adjacent to thesecond row. The second opening region 170 b is adjacent to the thirdopening region 170 c, and the second opening region 170 b is adjacent tothe fourth opening region 170 d. The area of the fourth opening region170 d may be larger than the area of the first opening region 170 a andthe area of the second opening region 170 b and less than the area ofthe third opening region 170 c. In this embodiment, the conductive line152 may also be located between the second opening region 170 b and thethird opening region 170 c, between the second opening region 170 b andthe fourth opening region 170 d, and between the first opening region170 a and the fourth opening region 170 d. In a word, the conductiveline 152 is a bent line that bypasses the first opening region 170 a,the second opening region 170 b, the third opening region 170 c, and thefourth opening region 170 d, but the disclosure is not limited thereto.In this embodiment, the light from the first opening region 170 a (e.g.,the light emitted by the organic electroluminescent pattern 161) mayhave the same color as the light from the second opening region 170 b(e.g., the light emitted by the organic electroluminescent pattern 162),and the light from the first opening region 170 a may have a differentcolor from the light from the third opening region 170 c (e.g., thelight emitted by the organic electroluminescent pattern 163). The lightfrom the fourth opening region 170 d (e.g., the light emitted by theorganic electroluminescent pattern 164) may have a different color fromthe light from the third opening region 170 c. For example, the color ofthe light from the first opening region 170 a, the color of the lightfrom the second opening region 170 b, the color of the light from thethird opening region 170 c, and the color of the light from the fourthopening region 170 d may be green, green, blue, and red respectively,but the disclosure is not limited thereto.

It should be noted that the first contact hole 142 and the first openingregion 170 a are separated by a first distance D1. The first distance D1is the shortest distance between the first contact hole 142 and thefirst opening region 170 a. More specifically, the first distance D1refers to the shortest distance between a vertical projection of abottom portion 174 of the first contact hole 142 on the substrate 110and a vertical projection of the bottom portion 173 of the first openingregion 170 a on the substrate 110. The first contact hole 142 and thesecond opening region 170 b are separated by a second distance D2. Morespecifically, the second distance D2 refers to the shortest distancebetween the vertical projection of the bottom portion 174 of the firstcontact hole 142 on the substrate 110 and a vertical projection of thebottom portion 173 of second opening region 170 b on the substrate 110.The second distance D2 is the shortest distance between the firstcontact hole 142 and the second opening region 170 b. In particular, thefirst distance D1 is different from the second distance D2. In thisembodiment, the second distance D2 may be larger than the first distanceD1, but the disclosure is not limited thereto. It should be noted that,with the layout design that makes the first distance D1 be differentfrom the second distance D2, the first opening region 170 a, the secondopening region 170 b, and the third opening region 170 c are arrangedclose to one another, so as to improve the resolution of the displaydevice 100.

FIG. 3 is a schematic enlarged view of a part of the display device ofFIG. 1. Referring to FIG. 3, a second direction y is parallel to abearing surface 110 a (as shown in FIG. 2) of the substrate 110. Inother words, the second direction y is perpendicular to a normaldirection of the bearing surface 110 a of the substrate 110, and thesecond direction y is perpendicular to the first direction x. The firstopening region 170 a has an end point 170 a-1 that is farthest away fromthe conductive line 152 in the second direction y. A virtual line R1that passes through the end point 170 a-1 is defined along the seconddirection y. In this embodiment, the first contact hole 142 and thesecond contact hole 144 corresponding to the first opening region 170 aare located on different sides of the virtual line R1. Thus, the firstopening region 170 a, the second opening region 170 b, and the thirdopening region 170 c are arranged closer to one another, so as tofurther improve the resolution of the display device 100.

Referring to FIG. 3, in this embodiment, the first opening region 170 amay have a polygonal shape, and the end point 170 a-1 may be a vertex ofthe polygonal shape. However, the disclosure is not limited thereto. Inother embodiments, the first opening region 170 a may have an ovalshape, a circular shape, or other non-polygonal shapes, and the endpoint 170 a-1 may be a point that is farthest away from the conductiveline 152 on the oval shape, the circular shape, or other non-polygonalshapes, and is not necessarily the vertex of the polygonal shape. Thefollowing is described with reference to FIG. 4. FIG. 4 is a schematicenlarged view of a part of the display device according to anotherembodiment of the disclosure. Referring to FIG. 4, the first openingregion 170 a has the end point 170 a-1 that is farthest away from theconductive line 152 in the second direction y. The virtual line R1 thatpasses through the end point 170 a-1 is defined along the seconddirection y, and the first contact hole 142 and the second contact hole144 corresponding to the first opening region 170 a are located ondifferent sides of the virtual line R1. Unlike the display device 100,in the display device 100A, the first opening region 170 a and thesecond opening region 170 b may have oval shapes. The first openingregion 170 a has the end point 170 a-1 that is farthest away from theconductive line 152 thereon, and the end point 170 a-1 may not fall on along axis or a short axis of the oval shape, but the disclosure is notlimited thereto. Moreover, in the embodiment of FIG. 4, the conductiveline 152 may have inconsistent line widths. For example, the conductiveline 152 has a first portion 152-1 and a second portion 152-1, a linewidth W1 of the first portion 152-1 is greater than a line width W2 ofthe second portion 152-2, and the spacer 172 overlaps with the firstportion 152-1, but the disclosure is not limited thereto.

Referring to FIG. 3, in this embodiment, the first contact hole 142 hasa first contour. The first contour of the first contact hole 142 has afirst point 142 a and a second point 142 b that are farthest away fromeach other. The first point 142 a and the second point 142 b define avirtual first extension line K1. The first point 142 a may be closer tothe corresponding data line DL than the second point 142 b, but thedisclosure is not limited thereto. The second contact hole 144 has asecond contour. The second contour of the second contact hole 144 has athird point 144 a and a fourth point 144 b that are farthest away fromeach other. The third point 144 a and the fourth point 144 b define avirtual second extension line K2. The third point 144 a may be closer tothe conductive line 152 than the fourth point 144 b, but the disclosureis not limited thereto. It should be noted that the extension directionof the first extension line K1 is different from the extension directionof the second extension line K2. For example, the extension direction ofthe first extension line K1 may be perpendicular to the extensiondirection of the second extension line K2. In other embodiments, anangle may be formed between the extension direction of the firstextension line K1 and the extension direction of the second extensionline K2, but the disclosure is not limited thereto. In this embodiment,the first contour of the first contact hole 142 has a first oval shape,and the first point 142 a and the second point 142 b that are farthestaway from each other on the first contour may be located at two ends ofthe long axis of the first oval shape. The second contour of the secondcontact hole 144 has a second oval shape, and the third point 144 a andthe fourth point 144 b that are farthest away from each other on thesecond contour may be located at two ends of the long axis of the secondoval shape. The long axis of the first oval shape may not be parallel tothe long axis of the second oval shape. Nevertheless, the disclosure isnot limited thereto. In other embodiments, the long axis of the firstoval shape may be parallel to the long axis of the second oval shape.The following is described with reference to FIG. 5.

FIG. 5 is a schematic enlarged view of a part of the display deviceaccording to yet another embodiment of the disclosure. Referring to FIG.5, the first contact hole 142 has a first contour. The first contour ofthe first contact hole 142 has the first point 142 a and the secondpoint 142 b that are farthest away from each other. The first point 142a may be closer to the third opening region 170 c than the second point142 b, but the disclosure is not limited thereto. The first point 142 aand the second point 142 b define the first extension line K1. Thesecond contact hole 144 has a second contour. The second contour of thesecond contact hole 144 has the third point 144 a and the fourth point144 b that are farthest away from each other. The third point 144 a maybe closer to the conductive line 152 than the fourth point 144 b, butthe disclosure is not limited thereto. The third point 144 a and thefourth point 144 b define the second extension line K2. The extensiondirection of the first extension line K1 may be parallel to theextension direction of the second extension line K2. More specifically,the first contour of the first contact hole 142 has a first oval shape,and the first point 142 a and the second point 142 b that are farthestaway from each other on the first contour may be located at two ends ofthe long axis of the first oval shape. The second contour of the secondcontact hole 144 has a second oval shape, and the third point 144 a andthe fourth point 144 b that are farthest away from each other on thesecond contour may be located at two ends of the long axis of the secondoval shape. Unlike the display device 100, in the embodiment of thedisplay device 100B, the long axis of the first oval shape and the longaxis of the second oval shape may be parallel to each other. In otherembodiments, an angle may be formed between the long axis of the firstoval shape and the long axis of the second oval shape, but thedisclosure is not limited thereto.

It should be noted that, although the first contour of the first contacthole 142 and the second contour of the second contact hole 144 have theoval shapes in the above example, the disclosure is not limited thereto.In other embodiments, the first contour of the first contact hole 142and the second contour of the second contact hole 144 may have othersuitable shapes. In addition, in other embodiments, the shape of thefirst contour of the first contact hole 142 and the shape of the secondcontour of the second contact hole 144 may not be necessarily the sameor similar.

Referring to FIG. 1 and FIG. 2, in this embodiment, the display device100 further includes the spacer 172. The spacer 172 is disposed on thesubstrate 110. More specifically, the spacer 172 is disposed among thesecond opening region 170 b, the third opening region 170 c, and thefourth opening region 170 d. The spacer 172 may partially overlap theconductive line 152. In other words, the spacer 172 and the portion ofthe conductive line 152 may use the same area in the directionperpendicular to the substrate 110 (in the top view) to save the area ofthe substrate 110 to be used by the first opening region 170 a, thesecond opening region 170 b, the third opening region 170 c, and/or thefourth opening region 170 d or other components, so as to improve theresolution and/or brightness of the display device 100. In thisembodiment, the spacer 172 and the pixel define layer 170 may be formedin the same layer, and the material of the spacer 172 may be the same asthe material of the pixel define layer 170. In a word, the spacer 172may be a protrusion portion of the pixel define layer 170. Nevertheless,the disclosure is not limited thereto. In other embodiments, the spacer172 and the pixel define layer 170 may be formed in different layers,and the material of the spacer 172 is not necessarily the same as thematerial of the pixel define layer 170. In other embodiments, the spacer172 may be disposed among the first opening region 170 a, the thirdopening region 170 c, and other fourth opening region 170 d not shownhere, but the disclosure is not limited thereto.

FIG. 8 illustrates a first side S1 and a second side S2 of theconductive line 152 of FIG. 1. Referring to FIG. 1, FIG. 2, and FIG. 8,in this embodiment, an orthographic projection of the first openingregion 170 a on the insulating layer 140 and an orthographic projectionof the second opening region 170 b on the insulating layer 140 arelocated on the first side 51 of an orthographic projection of theconductive line 152 on the insulating layer 140 (e.g., an upper regionof the conductive line 152 in FIG. 8). An orthographic projection of thethird opening region 170 c on the insulating layer 140 and anorthographic projection of the fourth opening region 170 d on theinsulating layer 140 are located on the second side S2 of theorthographic projection of the conductive line 152 on the insulatinglayer 140 (e.g., a lower region of the conductive line 152 in FIG. 8).The orthographic projection of the spacer 172 on the insulating layer140 may partially overlap the orthographic projection of the conductiveline 152 on the insulating layer 140. The orthographic projection of aportion of the spacer 172 on the insulating layer 140 may be located onthe second side S2 of the orthographic projection of the conductive line152 on the insulating layer 140, and the orthographic projection of thespacer 172 on the insulating layer 140 does not overlap the first sideS1 of the orthographic projection of the conductive line 152 on theinsulating layer 140. In a word, the orthographic projection of thefirst opening region 170 a on the insulating layer 140 and theorthographic projection of the second opening region 170 b on theinsulating layer 140 are located on the same side (e.g., the first sideS1) of the orthographic projection of the conductive line 152 on theinsulating layer 140, and the orthographic projection of the spacer 172on the insulating layer 140 does not be disposed across the conductiveline 152. Nevertheless, the disclosure is not limited to the above. FIG.6 is a schematic top view of the display device according to yet anotherembodiment of the disclosure. Referring to FIG. 6, unlike the displaydevice 100, in the embodiment of the display device 100C, theorthographic projection of the spacer 172 on the insulating layer 140may be disposed across the conductive line 152 to partially overlap thefirst side S1 and the second side S2 of the orthographic projection ofthe conductive line 152 on the insulating layer 140.

Referring to FIG. 1 and FIG. 2, in this embodiment, the conductive line152 may include a first straight portion 152 a, which is located betweenthe second opening region 170 b and the third opening region 170 c, anda second straight portion 152 b, which is located between the secondopening region 170 b and the fourth opening region 170 d. Morespecifically, the conductive line 152 may be a bent line, as shown inFIG. 8, wherein the first straight portion 152 a refers to the firststraight portion located between adjacent two bending portions 153 a and153 b, and the first straight portion is located between the secondopening portion 170 b and the third opening portion 170 c; and thesecond straight portion 152 b refers to the second straight portionlocated between adjacent two bending portions 153 d and 153 c, and thesecond straight portion is located between the second opening region 170b and the fourth opening region 170 d. An extension direction of thefirst straight portion 152 a is different from an extension direction ofthe second straight portion 152 b, but is not limited thereto. Inparticular, a length L1 of the first straight portion 152 a may bedifferent from a length L2 of the second straight portion 152 b, but thedisclosure is not limited thereto. Referring to FIG. 1 and FIG. 8, theconductive line 152 comprises a first straight portion 152 a and asecond straight portion 152 b, the first straight portion 152 a islocated between the second opening region 170 b and the third openingregion 170 c, the second straight portion 152 b is located between thesecond opening region 170 b and the fourth opening region 170 d, and alength L1 of the first straight portion 152 a is different from a lengthL2 of the second straight portion 152 b. The first straight portion 152a is located between adjacent two bending portions 153 a, 153 b, and thespacer 172 and one of the two bending portions 153 a, 153 b (i.e. thebending portions 153 a) are overlapped. FIG. 7 is a schematic top viewof the display device according to an embodiment of the disclosure.Referring to FIG. 7, in the embodiment of the display device 100D, thelength L1 of the first straight portion 152 a and the length L2 of thesecond straight portion 152 b are not the same. Unlike the displaydevice 100, in the embodiment of the display device 100D, the firstopening region 170 a and the second opening region 170 b may have ovalshapes.

To sum up, the display device disclosed in the embodiments of thedisclosure includes the first thin film transistor disposed on thesubstrate, the insulating layer disposed on the first thin filmtransistor, the conductive line, and the pixel define layer. Theconductive line is disposed on the insulating layer and is electricallycoupled to the first thin film transistor via the first contact hole ofthe insulating layer. The pixel define layer is disposed on theinsulating layer. The pixel define layer has the first opening region,the second opening region, and the third opening region. The conductiveline extends along the first direction. The first opening region and thesecond opening region are arranged along the first direction. The thirdopening region is adjacent to the first opening region and the secondopening region. The area of the first opening region is less than thearea of the third opening region. The area of the second opening regionis less than the area of the third opening region. The conductive lineis located between the first opening region and the third openingregion, and the first contact hole is located between the first openingregion and the second opening region. The first contact hole and thefirst opening region are separated by the first distance. The firstdistance is the shortest distance between the first contact hole and thefirst opening region. The first contact hole and the second openingregion are separated by the second distance. The second distance is theshortest distance between the first contact hole and the second openingregion, and the first distance is different from the second distance.With the layout design that makes the first distance be different fromthe second distance, the first opening region, the second openingregion, and the third opening region are arranged close to one another,so as to improve the resolution of the display device.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the disclosed embodimentswithout departing from the scope or spirit of the disclosure. In view ofthe foregoing, it is intended that the disclosure covers modificationsand variations provided that they fall within the scope of the followingclaims and their equivalents.

What is claimed is:
 1. A display device, comprising: a substrate; afirst thin film transistor disposed on the substrate; an insulatinglayer disposed on the first thin film transistor and having a firstcontact hole; a conductive line disposed on the insulating layer,wherein the conductive line is electrically coupled to the first thinfilm transistor via the first contact hole, and the conductive lineextends along a first direction; and a pixel define layer disposed onthe insulating layer, wherein the pixel define layer comprises a firstopening region, a second opening region, and a third opening region,wherein the first opening region and the second opening region arearranged along the first direction, the third opening region is adjacentto the first opening region, and the third opening region is adjacent tothe second opening region, wherein the conductive line is locatedbetween the first opening region and the third opening region, and thefirst contact hole is located between the first opening region and thesecond opening region, and an area of the first opening region is lessthan an area of the third opening region, an area of the second openingregion is less than the area of the third opening region, the firstcontact hole and the first opening region are separated by a firstdistance, the first contact hole and the second opening region areseparated by a second distance, and the first distance is different fromthe second distance.
 2. The display device according to claim 1, furthercomprising: an electrode partially overlapping the first opening region.3. The display device according to claim 2, further comprising: a powerline disposed on the substrate; and a second thin film transistor,wherein a first end of the second thin film transistor is electricallycoupled to the power line, and a second end of the second thin filmtransistor is electrically coupled to the electrode.
 4. The displaydevice according to claim 3, wherein one of a first end and a second endof the first thin film transistor is electrically coupled to a gate ofthe second thin film transistor.
 5. The display device according toclaim 2, further comprising: a second thin film transistor disposed onthe substrate, wherein the insulating layer is disposed on the secondthin film transistor, the electrode is disposed on the insulating layer,the insulating layer further has a second contact hole, and theelectrode is electrically coupled to the second thin film transistor viathe second contact hole.
 6. The display device according to claim 5,wherein a second direction is parallel to the substrate andperpendicular to the first direction, the first opening region comprisesan end point that is farthest away from the conductive line in thesecond direction, a virtual line passing through the end point isdefined along the second direction, and the first contact hole and thesecond contact hole are located on two different sides of the virtualline.
 7. The display device according to claim 5, wherein the firstcontact hole has a first contour, the first contour comprises a firstpoint and a second point that are farthest away from each other, and thefirst point and the second point define a first extension line, whereinthe second contact hole has a second contour, the second contourcomprises a third point and a fourth point that are farthest away fromeach other, and the third point and the fourth point define a secondextension line, wherein an extension direction of the first extensionline is different from an extension direction of the second extensionline.
 8. The display device according to claim 5, wherein the firstcontact hole has a first contour, the first contour comprises a firstpoint and a second point that are farthest away from each other, and thefirst point and the second point define a first extension line, whereinthe second contact hole has a second contour, the second contourcomprises a third point and a fourth point that are farthest away fromeach other, and the third point and the fourth point define a secondextension line, wherein an extension direction of the first extensionline is parallel to an extension direction of the second extension line.9. The display device according to claim 1, further comprising: a spacerdisposed on the substrate, wherein the pixel define layer furthercomprises a fourth opening region, and the spacer is disposed among thesecond opening region, the third opening region, and the fourth openingregion.
 10. The display device according to claim 9, wherein the spacerpartially overlaps the conductive line.
 11. The display device accordingto claim 9, wherein the conductive line has a first portion and a secondportion, a line width of the first portion is greater than a line widthof the second portion, and the spacer overlaps with the first portion.12. The display device according to claim 9, wherein a material of thespacer is the same as a material of the pixel define layer.
 13. Thedisplay device according to claim 1, wherein the pixel define layerfurther comprises a fourth opening region, the second opening region isadjacent to the third opening region and the fourth opening region, andan area of the fourth opening region is larger than the area of thesecond opening region and less than the area of the third openingregion.
 14. The display device according to claim 13, wherein theconductive line is located between the second opening region and thefourth opening region.
 15. The display device according to claim 13,wherein the conductive line is located between the second opening regionand the third opening region, and the conductive line is located betweenthe second opening region and the fourth opening region, wherein theconductive line comprises a first straight portion and a second straightportion, the first straight portion is located between the secondopening region and the third opening region, the second straight portionis located between the second opening region and the fourth openingregion, and a length of the first straight portion is different from alength of the second straight portion.
 16. The display device accordingto claim 15, wherein an extension direction of the first straightportion is different from an extension direction of the second straightportion.
 17. The display device according to claim 15, wherein the firststraight portion is located between adjacent two bending portions. 18.The display device according to claim 17, further comprising a spacer,wherein the spacer and one of the two bending portions are overlapped.19. The display device according to claim 13, wherein a color of a lightfrom the first opening region is the same as a color of a light from thesecond opening region, the color of the light from the first openingregion is different from a color of a light from the third openingregion, and a color of a light from the fourth opening region isdifferent from the color of the light from the third opening region. 20.The display device according to claim 1, further comprising: a data linedisposed on the substrate, wherein the first contact hole has a firstcontour, the first contour has a first point and a second point, thefirst point and the second point are farthest away from each other, thefirst point and the second point define a virtual first extension line,and an extension direction of the first extension line is different froman extension direction of the data line.